Fluke 39 - Page 100

39/41B
Service Manual
7-4
Figure 7-1. A1 Main PCA (Fluke 39 and 41B) (cont)
D
8200PF
C9
20PF
C25
D
R22
680K
D
20PF
C17
CR2
MBD301
CR3
MBD301
D
R8
15K
R12
15K
3.86918MHZ
Y1
D
D
.1
C23
.1
C26
.1
C28
.1
C30
.1
C13
.1
C15
.1
C18
.1
C20
.1
C21
.1
C24
.1
C27
.1
C29
.1
C31
.1
C32
.1
C16
X28C256E-25
MEM_IMAGE
OE
CE
WE
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
IO7
IO6
IO5
IO4
IO3
IO2
IO1
IO0
P1 P1
.1
C22
.1
C5
.1
C7
1
C47
1
C45
47K
Z1
30K
Z2
D
OE/VPP CS
A15
A14
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
27LV512R
U4
I/O16
I/O15
I/O14
IN/CLK
I/O13
I/O10
I/O9
I/O8
I/O7
I/O6
I/O5
I/O4
I/O11
I/O12
I/O3
I/O2
I/O1
IN/CLR IN/OE2 IN/OE1
I/O32
I/O31
I/O30
I/O29
I/O28
I/O27
I/O26
I/O25
I/O24
I/O23
I/O22
I/O21
I/O20
I/O19
I/O18
I/O17
EPM7032V-3
U3
P3
P3
D
0
R33
VCC
VCC
OE
CE
WE
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
DQ8
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
U6
MT5LC2568DJ-25
OE
CE
WE
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
DQ8
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
U7
MT5LC2568DJ-25
P6
P4
D
R37
47K
R82
0
R83
0
R84
0
R85
0
D
OE
D
D
D
D
D
D
D
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Q
Q
Q
Q
Q
Q
Q
Q
D
74LVT574DW
U1
OE
CE
WE
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
DQ8
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
U5
MT5LC2568DJ-25
VCC
VCC
47K
Z3
VCC
D
P2
P2
VBT+
D
VCC
R5
TIO
HEN/PB12 HR/W/PB11 HACK/PB14 HREQ/PB13
D21
D22
D23
D18
D17
D16
D20
D19
D11
D12
D13
D14
D15
PLOCK PCAP CKP CKOUT PINT QGND QGND QGND
D10
D9
D8
D7
D6
D5
D1
D2
D3
D4
D0
PS DS
WR
RD
RESET
EXTAL
XTAL
BG
BR
BN
WT
BS DR
DS0
QGND NGND NGND NGND NGND NGND DGND DGND DGND DGND DGND HGND DGND CGND HGND HGND HGND PGND SGND SGND
R4
A13
A11
A12
A15
A14
A10
QVCC QVCC QVCC QVCC
HVCC HVCC
CLVCC
SVCC CVCC NVCC NVCC NVCC DVCC DVCC DVCC PVCC
A9
A8
A7
A6
A5
A1
A2
A3
A4
A0
H7/PB7 H6/PB6 H5/PB5 H4/PB4 H3/PB3 H2/PB2 H1/PB1 H0/PB0 HA2/PB10 HA1/PB9 HA0/PB8 CLGND
STD/PC8
SRD/PC7
SCK/PC6
SC2/PC5
SC1/PC4
SC0/PC3
X/Y
MODEA/IRQA
MODEB/IRQB
MODEC/NMI
DSCK/OS1
DSI/OS0
RXD/PC0
TXD/PC1
SCLK/PC2
U2
DSP56L002
FLUKE 4X-1021
(2 of 6)
2
2
2
2
BL_A
SEL1
MID
LOW
!CS_BOOTROM = A15 * !PS
32KX8
EEPROM
CAL
!CS_EEPROM = !A15 * A14 * XY * !DS
PVCC
DSP56003
DSP56003DSP56003
SRAMSRAMSRAM
27256
DE COUPLING CAPACITORS
2825670327032
9313
93C46
LM358LCDLCD
HIGH
KEYPAD
!CS_SRAM = A15 * !A14 * !DS # !A15 * !PS
VEE
RESET*
CS_LCD*
BL_K
A<0>
LCD_E
WR*
CS_GAIN*
X1_VOLT
X2_VOLT
X4_VOLT
X1A_AMP
X10A_AMP
X1B_AMP
X10B_AMP
RD*
RD*
RD*
TRUE
RD*
D<23..0>
D<23..0>
DS*
XY
WR*
EE_UPLOW
LCD_PWR
MODEL
CKSUM_OK
LCD_E
CS_LCD*
MODEL
CS_EEPROM*
WR*
CS_BOOTROM*
CS_EEPROM*
INC_EEPOT*
CS_EEPOT*
DSPCLOCK
SCK
XY
CS_SRAM*
CS_LCD*
LCD_E
RESET
DS*
R0
R1
R2
IRQA*
DOUT_AMPS
DOUT
ATOD_EE
CS_AD*
FSO
SCK
CS_GAIN*
SCK*
CHL
WR*
DSPCLOCK
R0
C3
CKSUM_OK
TXD
RXD
DSI_OSO
DSCK_OS1
PWR_SW2
R1 R1
PWR_SW1
R0R0
R3R3
R2 R2
C0C0
C1C1
DSPCLOCK
C3C3
PWR_ON C2C2
BL_CT
LOW_BAT
TRUE
WR*
FSO
DOUT
DR*
DR*
CKP
WT*
WT*
BR*
BR*
NMI*
IRQB*
IRQA*
IRQA*
DOUT_EESER
RESET*
ATOD_EE
DIN
DS0
CHL
TRUE
DS*
LOW_BAT
TRUE
XY
R0
R3
R1
R2
RESET*
CS_EESER
W_DOG*
RD*
CS_BOOTROM*
EE_UPLOW
17
16
18
21
19
20
7
23
22
6
5
2
3
4
0
1
0
1
3
2
6
5
4
23
7
16
18
19
17
21
20
22
17
18
19
20
21
22
23
16
14
12
13
10
9
11
7
8
5
4
6
2
3
1
0
16
18
17
20
19
23
22
21
4
0
2
1
U11
4
3
5
7
6
5
14
15
8
9
10
11
12
13
0
1
4
2
3
5
6
8
7
9
11
10
8
9
10
11
12
13
14
15
12
0
1
2
3
4
5
6
8
7
10
9
11
12
16
17
18
23
22
21
19
20
0
5
14
15
0
4
1
2
3
4
5
6
9
10
8
7
11
12
0
2
1
3
4
5
7
6
8
9
10
12
11
13
15
14
0
2
1
3
4
5
7
6
8
9
10
12
11
13
14
15
16
18
17
616P
19
20
21
23
22
EE_UPLOW
IRQB*
NMI*
DOUT_VOLTS
7
9
5
1
34
2
6
8
10
12
1
11
3
4
5
6
7
8
9
10
2
7
13
24
19
8
6
1
18
22
20
5
4
21
23
3
2
17
15
16
14
12
11
9
10
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
1
2
3 1 2
1
9
11
12
813
714
615
516
417
318
219
12
A
C
A
C
1 2
3 4 5 6 7
8
9
10
11
12 13
14 15 16 17 18 19
20
21
22 23 24
25 26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41 42 43 44
45
46 47
48
49
50
51 52
53
54 55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119 120 121
122 123
124
125
126
127
128 129 130
131
132
1
2
4
5
6
7
8
9
11
12
13
14
16
17
18
19
20
21 24
25
26
27
28
29
31
32
33
34
36
37
38
39
40
41
43 44
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
13
14
12
11
10
9
8
7
6
5
4
3
2
1
13
14
12
11
10
9
8
7
6
5
4
3
2
1
13
14
12
11
10
9
8
7
6
5
4
3
2
1
2
3
4
5
6
7
8
9
10
11
13
14
15
18
19
20
21
22
23
24
25
27
28
29
30
31
R3
A<15..0>
TRUE
A<15..0>
RA13
RD*
CS_SRAM*
WR*
RA13
PS*
PS*
TRUE
PS*
PS*
EE_UPLOW